English
yo
Yo comes from Middle English yo, a variant of ya/ye ‘yes’, from Old English ġēa, or perhaps from Old English ēow ‘alas’.
- Proto-Germanicc. 500 BCE–200 CE*ja1‘yes, thus’reconstructed
- Old Englishc. 450–1150ġēa1‘yes, yea’uncertain
- Middle Englishc. 1150–1500yo1‘yes’
- Englishearliest quotation 2010yo1
attested reconstructed ? uncertain or disputed deepest recorded ancestor
- 1 Wiktionary, English yo
- Earliest quotation in Wiktionary’s entry: 2010, "Kafkaesque": “JESSE: That is messed up, yo.”.
Lineage
- Proto-Germanicc. 500 BCE–200 CE*jaWiktionary, English yo‘yes, thus’reconstructed
- Old Englishc. 450–1150ġēaWiktionary, English yo‘yes, yea’uncertain
- Middle Englishc. 1150–1500yoWiktionary, English yo‘yes’
- Englishearliest quotation 2010yoWiktionary, English yo. Earliest quotation in Wiktionary’s entry: 2010, "Kafkaesque": “JESSE: That is messed up, yo.”
first attested first attested in 1859 (as stated in Wiktionary’s etymology)
The story
As a greeting first attested in 1859, attested first as a cry of sailors and huntsmen (first attested in the 1400s; compare e.g. huzzah, giddyup). Modern popularity apparently dates from the early 20th century in Philadelphia, PA; amongst the Italian Community there, where io, with (as opposed to in standard Italian language) the stress on the ultima, was a common salutatory response among residents, particularly young males. This usage was apparently reinforced by the aforesaid English terms. It has been claimed to have been a common response at roll calls during World War 2 (see definition 4), and then most intensely attested in Philadelphia, Pennsylvania; it thence spread globally from American dominance of pop culture post-WWII.
Word family
English words that share an ancestor with yo, grouped by the ancestor they share, most familiar first.
through Old English ġēa ‘yes, yea’
Explore everything descended from *ja →
Another origin of yo
- Russianmodernёjo‘the name of the Cyrillic script letter Ё’
- Englishtodayyo
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Today it means
intj A greeting similar to hi.
Sources
Sources: Wiktionary, “yo”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / Proto-Germanic *ja / yo